Ball joint for a universal joint device



FIG. 1 is a perspective view of a ball joint for a universal joint device, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is another perspective view thereof.

The broken lines are directed to the environmental structure defining the boundary of the claimed portions of the ball joint for a universal joint device and form no part of the claimed design. 

The ornamental design for a ball joint for a universal joint device, as shown and described. 